SISTEM GOVERNOR CONTROL VALVE BERBASIS FUZZY-PID DALAM MENJAGA KESTABILAN PUTARAN TURBIN UAP PLTP

Power generation facilities that use geothermal resources as a source of high pressure and high temperature steam to drive turbines to generate electricity are known as geothermal power plants (PLTP). Based on the appearance of geothermal per unit area on the surface, even with its extreme heat, Indonesia is the fourth largest country in the world. The problem approach is carried out by analyzing specifically the scope of the control valve system that is integrated with the governor. Input or input determines the governor command. The input is based on 2 types of incoming signals, namely, speed (steam pressure), and load. The controller used as a controller is FUZZY – PID which is looking for the lowest overshoot or below 11% which is the standard transient stability in PLTP. The graph of the transient response of the PID controller can be seen that the desired output result has not been achieved which is where the settling time still takes a long time ie 27 s. Also, the overshoot is still quite high at 8.152 s. These results indicate that the weakness of the fuzzy controller is only the length of the settling time, which is 25 s. The results of the Fuzzy - PID controller are quite good, that the rise time is 1.396 better than the other controllers. The discussion of the governor control valve can be concluded that the transient response using the Fuzzy - PID produces a rise time difference of 8.219 s, and a settling time of 17 s compared to the Fuzzy controller. No noise and stable output power. What can be implemented after making this scientific work is how to build an optimal system and be able to identify and maximize geothermal potential.